الفهرس 
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Abstract
Introduction: Heart failure (HF) is a major worldwide public health disease, and a substantial driver of hospital admissions and resource utilization. It is a clinically defined syndrome, and can occur in patients with preserved (HFpEF) or reduced (HFrEF) left ventricular ejection fraction (EF). Aim of the work: The present study was designed to investigate lung ultrasound as a predictor of outcome in heart failure patients with preserved and reduced ejection fraction including heart failure with mid-range EF (HFmrEF). Subjects and methods: The study included 80 patients who underwent echocardiography and lung ultrasound, conducted from 2020 to 2022 Damietta cardiology center. According to echocardiography results, the patients were classified into two groups: group A: include 50 patients with EF less than 50%. group B: included 30 patients with EF more than 50%. Results: The study results show that there was no significant difference between age of patients of the two studied groups, no significant difference between the two groups regarding gender. Regarding DM, HTN, and smoking proved no significant differences between the two studied groups About congestion score at admission and at discharge our study showed no statistically significant difference between the two studied groups while there was a significant difference between the congestion score at admission and at discharge in the two studied groups as the score significantly decrease at discharge in both groups About Lung Ultrasound 12 h of admission among A and B groups there was no significant difference in B-lines numbers between the two groups with 78% of group A had less than 30 B-lines compared to 80% in group B and 22% of group A had more than 30 B-lines compared to 20% in group B. Conclusion: A severe degree of pulmonary congestion (PC) defined by >30 B‐lines on the anterolateral chest strongly predicts HF rehospitalization in patients with HFrEF and HFpEF. There is significant positive correlation between clinical congestion (congestion score) and LUS (BL number) in patients with HFrEF.